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Boat-lift control systems

Rugged 30-amp control systems for single, dual, and quad-motor lifts — built around heavy-duty 30-amp relays and your choice of AC or DC. Every system is FCC & ETL certified, with optional auto-stop and per-motor leveling so your lift travels the same way every time.

Control systems

One platform, from PWC lifts to quad-motor docks

Pick by motor count and voltage. The "A" suffix adds auto-stop; DC versions drive 12 VDC and hydraulic lifts.

GEM GRP1 personal-watercraft control system
Personal watercraft

GRP1

GRP1

Compact control for personal-watercraft lifts. Ships with a floating, water-resistant transmitter that reaches about 300 ft, so you can run the lift from anywhere on the dock.

  • Motors: 1 motor, up to 1 HP
  • Voltage: 120 VAC
  • Auto-stop: Not available
GEM GR1 single-motor control system
Single motor · AC

GR1 / GR1A

GR1 · GR1A

One-motor control with a 3-button transmitter and an on/off security switch on the box. Step up to the GR1A for optional auto-stop at the upper and lower limits.

  • Motors: 1 motor
  • Voltage: 110/220 VAC
  • Auto-stop: Optional (GR1A)
GEM GR1-DC single-motor 12 VDC control system
Single motor · DC

GR1-DC / GR1A-DC

GR1-DC · GR1A-DC

The single-motor control in a 12 VDC version for battery and hydraulic lifts. Choose the GR1A-DC when you want optional auto-stop at the travel limits.

  • Motors: 1 motor or hydraulic
  • Voltage: 12 VDC
  • Auto-stop: Optional (GR1A-DC)
GEM GR2 two-motor control system
Two motor · AC

GR2 / GR2A

GR2 · GR2A

Two-motor control for dual-motor lifts. The GR2A adds auto-stop and keeps the lift level as it travels; auto-stop pairs with one limit-switch style (KELS, KCLS, KFLS, or KRLS).

  • Motors: 2 motors
  • Voltage: 110/220 VAC
  • Auto-stop: Optional + leveling (GR2A)
GEM GR2-DC two-motor 12 VDC control system
Two motor · DC

GR2-DC / GR2A-DC

GR2-DC · GR2A-DC

The two-motor control in a 12 VDC version for battery and hydraulic dual-motor lifts. Select the GR2A-DC for optional auto-stop.

  • Motors: 2 motors or hydraulic
  • Voltage: 12 VDC
  • Auto-stop: Optional (GR2A-DC)
GEM GR2F1 two-for-one control system
Two-for-one

GR2F1

GR2F1

The "2-for-1" controller runs two independent single-motor lifts — or a pair of davits — from a single box, each operated separately.

  • Motors: 2 independent single-motor lifts/davits
  • Voltage: 110/220 VAC
  • Auto-stop: Not available
GEM GR1or2 alternating control system
Alternating

GR1or2

GR1or2

Alternates control between Motor 1 and Motor 2 — switch which motor you're driving right from the remote or the box.

  • Motors: Motor 1 or Motor 2 (selectable)
  • Voltage: 110/220 VAC
  • Auto-stop: Not available
GEM GR4 four-motor control system
Four motor · AC

GR4 / GR4A

GR4 · GR4A

Four-motor control for quad-motor docks, with independent leveling on every motor. Choose the GR4A for optional auto-stop at the limits.

  • Motors: 4 motors, independent leveling
  • Voltage: 230 VAC only
  • Auto-stop: Optional (GR4A)
Transmitters & receivers

Remotes and in-cabinet receivers

The current 7240 transmitter ships with every new system. Legacy remotes and receivers are listed for reference and replacement.

GEM 7240 three-button floating transmitter
Current

7240 transmitter

7240

The current three-button floating remote, with an auxiliary function and two CR2032 cells. Shipped on systems from March 2007 onward and stocked for replacement.

  • Buttons: 3 + auxiliary function
  • Battery: 2× CR2032
  • Build: Floating, water-resistant
GEM 6230 two-button floating transmitter
Legacy

6230 transmitter

6230

The earlier two-button-plus-stop floating remote. Still floats and works, but is superseded by the 7240 on current systems.

  • Buttons: 2 + stop
  • Build: Floating
  • Status: Legacy
GEM SP-7004 in-cabinet 4-channel receiver
Receivers

SP-7004 / SP-7004A

SP-7004 · SP-7004A

The 4-channel receivers that mount inside the control cabinet. The "A" version adds auto-stop support for systems that drive to the travel limits.

  • Channels: 4-channel
  • Mounting: In-cabinet
  • Auto-stop: SP-7004A only

Pre-2007 units use different-frequency remotes and may need an upgrade kit to pair with current transmitters — see the Part Numbers reference for the right kit.

Limit switches

Auto-stop limit switches

Auto-stop and leveling need a limit switch matched to your lift's drive. Pick the style that fits your hardware.

GEM KELS E-Drive limit switch
E-Drive

KELS

KELS

The E-Drive limit switch for stopping travel at the upper and lower limits.

GEM KCLS Sea Drive limit switch
Sea Drive

KCLS

KCLS

The Sea Drive limit switch (by Golden), matched to Sea Drive hardware.

GEM KFLS Flat Plate limit switch
Flat Plate

KFLS

KFLS

The Flat Plate limit switch for flat-plate drive lifts.

GEM KRLS Rotary limit switch
Rotary

KRLS

KRLS

The Rotary limit switch for rotary-style drives.

Need help choosing?

Tell us your motor count, drive style, and voltage and we'll spec the right controller, transmitter, and limit switch. Find a dealer near you, or reach our team in Naples.